Kakao Releases Solution Explanation for 'Kakao T Bike' Problem from 2021 New Graduate Recruitment Second Coding Test

Kakao has released the solution explanation for the 'Kakao T Bike Management Simulation' problem from the second coding test of its 2021 new developer recruitment. This test was conducted online and non-face-to-face due to COVID-19, ensuring stability through a video proctoring system and a pre-test rehearsal.

Problem Overview and Evaluation Criteria

Applicants must operate trucks to minimize canceled rental requests in order to address imbalanced demand in an electric bicycle rental service. Scores are calculated based on achievement rate (95%) and efficiency (5%), with the achievement rate being absolutely critical.

Passing Criteria by Scenario

• Scenario 1 (5x5 area, 5 trucks, 100 bikes): Average successful rental count for successful candidates: 1,268
• Scenario 2 (60x60 area, 10 trucks, 10,800 bikes): Average successful rental count for successful candidates: 9,652

Among successful candidates, 54.4% of those who passed Scenario 1 also achieved significant scores in Scenario 2.